Early diagenetic chert serves as a critical archive of life on Earth ... domains within crystals that exhibit sweeping extinction consistent with initial spherulitic growth. We attribute the range of ...

It’s unique, too, because of a long, open seam of chert, a type of rock especially suited for stone tool–working, as well as for resisting decay. The fresh water running through the area was ...

These include tools designed for hunting and cutting. Except for one chert artefact, all stone tools were made of limestone, much of which was derived from beach cobbles or pebbles, or sourced from ...

Loron and colleagues reached this conclusion by “contrasting the anatomy and molecular composition of Prototaxites with contemporary fungi from the 407-million-year-old Rhynie chert,” they added.

When ancient humans first invented stone tools, they may have been trying to emulate naturally formed sharp stones, meaning they would not have needed a huge leap of inspiration. Can we ever know ...

Jaspers and cherts are the rocks most often confused with Lake Superior agates Lakers formed when mineral-infused solutions seeped into the gas bubbles of volcanic rocks Lake Superior agates are ...

Get Instant Summarized Text (Gist) Surface-modified apatite nanoparticles, synthesized with controlled pH, enhance the biocompatibility of medical implants by improving cell adhesion. The pH ...

At the Belson site, the researchers discovered tools that were made with a type of stone called chert from what is now western Kentucky, about 400 miles from the Belson site. These tools were then ...

At the Belson site, the researchers discovered tools that were made with a type of stone called chert from what is now western Kentucky, about 400 miles from the Belson site. These tools were then ...

Among the most frequently unearthed artefacts from archaeological sites in North America dating back 13,000 years are Clovis points, which are sharpened tips made by shaping rocks like chert ...

On top of the pyramid, the archaeologists found some offerings: ceramic vessels; a ceramic animal leg, possibly of an armadillo; and a chert knife or spear point. These offerings "were deposited ...